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<p>Yes Irit, but you say in the Host side that has the OVS which is
connected to the VMs. Or are there any further steps to be done
also on the VMs in certain cases. In short it would be interesting
if you don't have to do much inside the VM, only in the host to
have some performance improvment gains. Do you think that is
feasible ?<br>
</p>
<p>Fernando<br>
</p>
<br>
<div class="moz-cite-prefix">On 28/11/2017 06:12, Irit Goihman
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAA=i7HOhcsAO8DCzjpuKcyQn8Vw75BaLS2oi_rsDk_v+HgNLUg@mail.gmail.com">
<div dir="ltr">Hi Fernando,<br>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Nov 27, 2017 at 9:25 PM,
FERNANDO FREDIANI <span dir="ltr"><<a
href="mailto:fernando.frediani@upx.com" target="_blank"
moz-do-not-send="true">fernando.frediani@upx.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"> <font face="arial, helvetica,
sans-serif">Hello<br>
<br>
As some may have seen recently OVS DPDK has been
introduced to oVirt (<a
class="gmail-m_4050765780074698563moz-txt-link-freetext"
href="https://ovirt.org/blog/2017/09/ovs-dpdk/"
target="_blank" moz-do-not-send="true">https://ovirt.org/blog/2017/<wbr>09/ovs-dpdk/</a>).
This is very interesting feature which can make a huge
performance difference in terms of network
performance.<br>
<br>
Just wanted to ask if anyone has tested it in any
environment and made any comparison, specially for
packet forward (e.g: running Virtual Routers or
Virtual Firewalls with virtio) or packet dropping as
well.</font></div>
</blockquote>
<div><br>
</div>
<div>You can see Intel OVS DPDK performance results compared
to OVS native in <a
href="https://download.01.org/packet-processing/ONPS2.1/Intel_ONP_Release_2.1_Performance_Test_Report_Rev1.0.pdf"
moz-do-not-send="true">https://download.01.org/packet-processing/ONPS2.1/Intel_ONP_Release_2.1_Performance_Test_Report_Rev1.0.pdf</a></div>
<div><br>
</div>
<div>Performance results of OVS DPDK in oVirt setup will be
published soon.</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"><br>
<font face="arial, helvetica, sans-serif"> One doubt I
have and if someone could clarify is: Should I enable
DPDK in the Host any traffic forwarded to any VMs will
automatically benefit from this performance gain of
DPDK or there additional steps that need to be put in
place inside the VM when sharing a physical Network
Interface ?</font></div>
</blockquote>
<div><br>
</div>
<div>Enabling DPDK is not enough. Since it's tightly coupled
to system hardware a few steps are needed in order to
achieve good performance results. For example: disabling
interrupts, enabling hugepages, isolating CPU cores,
allocating them to PMD threads and pinning vcpus.</div>
<div><br>
</div>
<div>More information can be found here:</div>
<div><a
href="http://docs.openvswitch.org/en/latest/intro/install/dpdk/"
moz-do-not-send="true">http://docs.openvswitch.org/en/latest/intro/install/dpdk/<br>
</a></div>
<div><a
href="http://dpdk.org/doc/guides-16.04/linux_gsg/nic_perf_intel_platform.html"
moz-do-not-send="true">http://dpdk.org/doc/guides-16.04/linux_gsg/nic_perf_intel_platform.html<br>
</a></div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"><br>
<br>
<font face="arial, helvetica, sans-serif"> Thanks</font><span
class="gmail-HOEnZb"
style="font-family:arial,helvetica,sans-serif"><font
color="#888888"><br>
Fernando<br>
</font></span> </div>
<br>
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</blockquote>
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